全文获取类型
收费全文 | 929篇 |
免费 | 8篇 |
专业分类
化学 | 573篇 |
晶体学 | 10篇 |
力学 | 10篇 |
数学 | 46篇 |
物理学 | 298篇 |
出版年
2021年 | 5篇 |
2020年 | 9篇 |
2019年 | 13篇 |
2018年 | 9篇 |
2017年 | 9篇 |
2016年 | 19篇 |
2015年 | 13篇 |
2014年 | 15篇 |
2013年 | 29篇 |
2012年 | 38篇 |
2011年 | 46篇 |
2010年 | 37篇 |
2009年 | 27篇 |
2008年 | 48篇 |
2007年 | 53篇 |
2006年 | 34篇 |
2005年 | 37篇 |
2004年 | 33篇 |
2003年 | 42篇 |
2002年 | 41篇 |
2001年 | 27篇 |
2000年 | 27篇 |
1999年 | 12篇 |
1998年 | 13篇 |
1997年 | 14篇 |
1996年 | 17篇 |
1995年 | 16篇 |
1994年 | 17篇 |
1993年 | 10篇 |
1992年 | 16篇 |
1991年 | 22篇 |
1990年 | 16篇 |
1989年 | 9篇 |
1988年 | 10篇 |
1987年 | 7篇 |
1986年 | 14篇 |
1985年 | 14篇 |
1984年 | 13篇 |
1983年 | 5篇 |
1982年 | 12篇 |
1980年 | 8篇 |
1979年 | 6篇 |
1978年 | 8篇 |
1977年 | 10篇 |
1974年 | 6篇 |
1973年 | 6篇 |
1969年 | 5篇 |
1968年 | 5篇 |
1967年 | 6篇 |
1966年 | 5篇 |
排序方式: 共有937条查询结果,搜索用时 15 毫秒
1.
Optical Review - Increasing efficiency and productivity in the field of agriculture is important to provide sufficient food to the world’s increasing population. It is important to monitor... 相似文献
2.
Watanabe Sou Senzaki Tatsuya Shibata Atsuhiro Nomura Kazunori Takeuchi Masayuki Nakatani Kiyoharu Matsuura Haruaki Horiuchi Yusuke Arai Tsuyoshi 《Journal of Radioanalytical and Nuclear Chemistry》2019,322(3):1273-1277
Journal of Radioanalytical and Nuclear Chemistry - Extraction chromatography flow-sheet employing octyl(phenyl)-N,N-diisobutylcarbonoylmethylphosphine oxide and bis(2-ethylhexyl) hydrogen phosphate... 相似文献
3.
A multi-charged particle model with local U(1)μ-τ to explain muon g–2, flavor physics,and possible collider signature 下载免费PDF全文
We consider a model with multi-charged particles, including vector-like fermions, and a charged scalar under a local \begin{document}$ U(1)_{\mu - \tau} $\end{document} ![]()
![]()
symmetry. We search for an allowed parameter region explaining muon anomalous magnetic moment (muon \begin{document}$ g-2 $\end{document} ![]()
![]()
) and \begin{document}$ b \to s \ell^+ \ell^- $\end{document} ![]()
![]()
anomalies, satisfying constraints from the lepton flavor violations, Z boson decays, meson anti-meson mixing, and collider experiments. Via numerical analysis, we explore the typical size of the muon \begin{document}$ g-2 $\end{document} ![]()
![]()
and Wilson coefficients to explain the \begin{document}$ b \to s \ell^+ \ell^- $\end{document} ![]()
![]()
anomalies in our model when all other experimental constraints are satisfied. Subsequently, we discuss the collider physics of the multicharged vectorlike fermions, considering a number of benchmark points in the allowed parameter space. 相似文献
4.
5.
6.
7.
Watanabe Sou Sano Yuichi Kofuji Hirohide Takeuchi Masayuki Shibata Atsuhiro Nomura Kazunori 《Journal of Radioanalytical and Nuclear Chemistry》2018,316(3):1113-1117
Journal of Radioanalytical and Nuclear Chemistry - The extraction chromatography experiments for Am(III) and Cm(III) recovery from genuine HLLW were carried out in order to demonstrate modified 2... 相似文献
8.
Yoshiaki Hattori Shinobu Mukasa Hiromichi Toyota Shinfuku Nomura 《Current Applied Physics》2013,13(6):1050-1054
The electrical breakdown of microwave plasma in water was investigated between 1 and 30 kPa. The dependency of the ignition power for generating plasma on the size of coaxial electrode was measured. The ignition power decreases with a decrease of the diameter of the inner electrode. The behavior of microwave plasma in water was observed using a high-speed camera. The plasma ignites in a bubble generated by microwave heating. The model for calculating the electric field was created on the basis of the captured images of the bubble just before plasma ignition. The method presented can be used to visualize the electrical field distribution in the bubble. The electric field breakdown was calculated using the measured ignition power. The electric field breakdown of plasma in water is of the same order as gas phase plasma. 相似文献
9.
Ryota Moriai Yu-suke Naito Ryosuke Nomura Shigeaki Funyu Ken-ich Ishitsuka Naoki Asano Sentaro Okamoto 《Tetrahedron letters》2014
1,3-Diarylpropenes 9 having a 1,3-dialkoxy-2-methylpropan-2-yl group were designed as tethering monomers for folded H-stacking polymers, and were readily synthesized from 2-ethoxymethylidene malonate in four- or five-steps, including a facile sequential addition–elimination–addition reaction of benzyl zinc reagents. The preference for the closed (stacked) conformation in the resulting 2-substituted 1,3-diarylpropanes 9 was evaluated using MM2 calculations, 1H NMR analyses, and fluorescence measurements. Copolymerization of the resulting monomers 9 with compounds containing π-units provided polymers with blue-shifted UV-absorptions both in solution and as films, compared with that of a model compound containing a single π-unit. This optical property is unique to H-aggregated π-units. 相似文献
10.
Jun Yamamoto Nami Maeda Chiaki Komiya Tomohiro Tanaka Masaya Denda Koji Ebisuno Wataru Nomura Hirokazu Tamamura Youichi Sato Aiko Yamauchi Akira Shigenaga Akira Otaka 《Tetrahedron》2014
A fluoride-responsive (FR) amino acid that induces amide bond cleavage upon the addition of a fluoride was developed, and it was applied to an FR traceable linker. By the use of an alkyne-containing peptide as a model of an alkynylated target protein of a bioactive compound, introduction of the FR traceable linker onto the peptide was achieved. Subsequent fluoride-induced cleavage of the linker followed by labeling of the released peptide derivative was also conducted to examine the potential applicability of the FR traceable linker to the enrichment and labeling of alkynylated target molecules. 相似文献